MachineID is confidential and should not be exposed on the network

The Hostname Plugin allows using MachineID in a template to generate hostname.

Per the manual page and the machine id library used by this project, machine-id is confidential and shouldn't be disclosed in whole or part.

How do we feel about adding "SecuredMachineID" as an available template variable in the hostname plugin to generate a machine-id derived ID using machine.id.ProtectedID("yipCloudInitHostnameConfiguration"), then later deprecating "MachineID" with a warning when its used?